Armagaon was the second colony of the English East India Company in Southern India. Its original name was Durgarazpatnam (Dugarazpatam). .
It was chiefly inhibited by salt manufacturers. It was the first place occupied by the British who erected a factory here in 1625. It was a small port 36 miles North of Pulicat.
In the time of Gurava Naidu, the great great grandfather of Raja Gopal Naidu, some Englishmen came to the port and sent for the chief men of the place, Gurava Naidu and the accountant, Patnaswamula Armogam Mudaliar, and said they wished to build a fort there. They landed a canon and fired a shot in a westerly Direction and asked for as much as land the shot had traversed. The land belonged to Venkatagadi Raja, who was induced by Gurava Naidu and Armogam to allow the strangers to occupy the spot called Chenva Kuppam. Accordingly they built a fort there and called the place in the honour of Armogam Mudaliar.